I everyone I have been turning for a long time now and wanted to get into segmenting. I made the wedgie sled and can make rings. Now my question is this, if I want to make a 10 inch diameter bowl, the last ring will have a 10 diameter or so. How do I know how much smaller to make each ring under it, if that ring has a 10” diam, the does the one under it have. 9.75? The numbers are used as an example, just trying to figure out how to step up or down with regards to ring diameter. Hope I explained it ok? Thanks everyone for any input.